US20120016374A1

US20120016374A1 - Intraocular lens injector

Info

Publication number: US20120016374A1
Application number: US12/856,847
Authority: US
Inventors: Myoung Soo Han
Original assignee: RET CO Ltd
Current assignee: RET CO Ltd
Priority date: 2010-07-15
Filing date: 2010-08-16
Publication date: 2012-01-19
Also published as: KR20120007692A; KR101191295B1

Abstract

Disclosed herein is an intraocular lens injector for inserting an intraocular lens into an eye, the intraocular lens injector including: a cylindrical cylinder, into which a plunger for passing the intraocular lens to be guided into the eye is inserted; a connection block having a C-shaped longitudinal cross-section and integrally formed at the front end of the cylinder; a cartridge, which is connected to the connection block and includes first and second wing portions, which are folded with respect to each other, first and second receiving grooves formed at the connection portion of the first and second wing portions and having a semicircular longitudinal cross-section, and a truncated conical guide portion, which extends from the second receiving groove in the lateral direction and includes a guide passage having a circular cross-section corresponding to the shape of the assembled first and second receiving grooves; and an engagement member having a circular cross-section corresponding to the shape of the assembled first and second receiving grooves and maintaining the intraocular lens in a folded state.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean Patent Application No. 10-2010-0068346, filed on Jul. 15, 2010, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND

1. Field of the Invention
The present invention relates to an intraocular lens injector for inserting an intraocular lens into an eye in replacement of a crystalline lens extracted during cataract surgery, and more particularly, to an intraocular lens injector, in which a cartridge, in which an intraocular lens is placed, is integrally formed with a cylinder, in which a plunger slides, and the cartridge is slidably covered such that the intraocular lens can be kept or carried while being placed in the cartridge, thereby eliminating the inconvenience of connecting the cartridge including the intraocular lens to the cylinder during cataract surgery and facilitating the cataract surgery.
2. Discussion of Related Art
Cataract is a disease caused by opacity of the crystalline lens of the eye and may lead to blindness in severe cases. The cataract is classified into a congenital cataract present in utero or at birth, a senile cataract occurring in the aged, a generalized cataract caused by various diseases, and the like. Among them, the senile cataract is most frequently observed in the aged.
Methods for treatment of cataract include pharmacotherapy and surgery. Since there is no guarantee that the pharmacotherapy can completely cure the cataract, the cataract surgery is mainly used.
Cataract surgery methods include intracapsular extraction, in which the entire crystalline lens and its enclosing capsule are removed, and extracapsular extraction, in which the posterior capsule of the crystalline lens having a thickness of about 0.01 mm, which is located adjacent to the hyaloid, is left in place and the remaining crystalline lens is removed.
The intraocular lens is an artificial lens used to replace the natural crystalline lens of the eye when the natural lens has cataracts or is otherwise diseased. The intraocular lens is also sometimes implanted into an eye to correct refractive errors of the eye. The intraocular lens may be made of a variety of materials or combinations of materials such as poly(methyl methacrylate) (PMMA), silicone, hydrogel, silicone hydrogel, etc.
In order to implant the intraocular lens into the eye, the sclera of the eye is incised, and a viscoelastic material is injected into the sclera to protect the anterior tissues. Then, the upper part of the lens capsule is incised to remove the clouded lens. Subsequently, the clouded lens nucleus is completely removed from the lens capsule, and the intraocular lens is injected into the lens capsule while injecting the viscoelastic material into the lens capsule to facilitate the insertion of the intraocular lens. The intraocular lens is injected into the lens capsule in a folded or rolled state and then restored to its original state, during which an intraocular lens injector is used.
The above-described intraocular lens injector has a structure in which a cartridge in which an intraocular lens in a folded or rolled state is placed and a cylinder for pushing the intraocular placed in the cartridge to the eye are separated from each other, and thus it is inconvenient to connect the cartridge and the cylinder for the use of the intraocular lens injector. Moreover, the intraocular lens preloaded into the cartridge is inserted into the eye by pushing the cylinder during cataract surgery on the eye from which the crystalline eye is extracted, which increases the difficulty of the surgery.
Meanwhile, the clouded natural crystalline lens located in the lens capsule is removed during cataract surgery known as phacoemulsification. It is preferred to incise the eye as small as possible to prevent post-cataract astigmatism from occurring at the incision area and improve the treatment. The standard size of the incision is less than 3 mm. Recently, the size of the incision is reduced to below 2 mm by the introduction of phacoemulsification or laser phacoemulsification using two hands. Here, if the size of the intraocular lens and/or the injector is greater than the incision area, it is necessary to extend the incision area.
Various studies have been carried out to solve the above problems, various studies have been conducted to in progress in recently years, but there is no clear solution yet.

SUMMARY OF THE INVENTION

The prevent invention has been made in an effort to solve the above-described problems associated with the prior art, and an object of the present invention is to provide an intraocular lens injector, in which an intraocular lens is placed on first and the second receiving grooves of a cartridge and enclosed within the first and second receiving grooves by a cover member which is inserted into a connection block together with a second wing portion of the cartridge and detachably connected to the connection block, thus enabling effective handling during surgery or distribution.
To accomplish the above objects of the present invention, there is provided an intraocular lens injector for inserting an intraocular lens into an eye, the intraocular lens injector including: a cylindrical cylinder, into which a plunger for passing the intraocular lens to be guided into the eye is inserted; a connection block having a C-shaped longitudinal cross-section and integrally formed at the front end of the cylinder; a cartridge, which is connected to the connection block and includes first and second wing portions, which are folded with respect to each other, first and second receiving grooves formed at the connection portion of the first and second wing portions and having a semicircular longitudinal cross-section, and a truncated conical guide portion, which extends from the second receiving groove in the lateral direction and includes a guide passage having a circular cross-section corresponding to the shape of the assembled first and second receiving grooves; and an engagement member having a circular cross-section corresponding to the shape of the assembled first and second receiving grooves and maintaining the intraocular lens in a folded state.
The engagement member may include an engagement projection projecting from the first wing portion and an engagement groove fixedly engaged with the engagement projection.
The first and second receiving grooves of the cartridge may include first and second opening portions formed inclined at the rear thereof to guide the insertion of the plunger.
The front end of the guide passage of the truncated conical guide portion may have a diameter of 1.8 mm.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view showing an intraocular lens injector in accordance with the present invention in which a cartridge and a cover member are connected to each other.

FIG. 2 is an exploded perspective view showing the intraocular lens injector in accordance with the present invention of FIG. 1.

FIG. 3 is an exploded perspective view showing that an intraocular lens is guided by a cartridge and a plunger in accordance with the present invention.

FIG. 4 is an enlarged perspective view showing a cartridge as a main element of the intraocular lens injector in accordance with the present invention.

FIG. 5 is an enlarged perspective view showing the cartridge of FIG. 4 viewed in the opposite direction.

FIG. 6 is a view showing a front structure and a right side structure of the cartridge of FIG. 5.

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6 and a view showing two folded wing portions of the cartridge.

FIG. 8 is a cross-sectional view taken along line B-B showing a state where a plunger is inserted to push an intraocular lens into a guide passage.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings such that those skilled in the art to which the present invention pertains can easily practice the present invention.
The configuration of an intraocular lens injector of the present invention will be described below.
The intraocular lens injector for inserting an intraocular lens 10 into an eye of the present invention includes: a cylindrical cylinder 20, into which a plunger 30 for passing the intraocular lens 10 to be guided into the eye is inserted; a connection block 50 having a C-shaped longitudinal cross-section and integrally formed at the front end of the cylinder 20; a cartridge 40, which is connected to the connection block 50 and includes first and second wing portions 41 and 43, which are folded with respect to each other, first and second receiving grooves 41 a and 43 a formed at the connection portion of the first and second wing portions 41 and 43 and having a semicircular longitudinal cross-section, and a truncated conical guide portion 45, which extends from the second receiving groove 43 a in the lateral direction and includes a guide passage 45 a having a circular cross-section corresponding to the shape of the assembled first and second receiving grooves 41 a and 43 a; and an engagement member 47 having a circular cross-section corresponding to the shape of the assembled first and second receiving grooves 41 a and 43 a and maintaining the intraocular lens 10 in a folded state.
The engagement member 47 includes an engagement projection 47 a projecting from the first wing portion 41 and an engagement groove 47 b fixedly engaged with the engagement projection 47 a.
The first and second receiving grooves 41 a and 43 a of the cartridge 40 include first and second opening portions 41 b and 43 b formed inclined at the rear thereof to guide the insertion of the plunger 30.
The front end of the guide passage 45 a of the truncated conical guide portion 45 may have a diameter T of 1.8 mm.
The reason for this is to allow the intraocular lens injector to be inserted into the incision area of less than 2 mm during phacoemulsification or laser phacoemulsification using two hands, thus facilitating the surgery without extending the incision area.
The intraocular lens injector of the present invention may further include a cover member 60 inserted into the connection block 50 together with the second wing portion 43 of the cartridge 40 and detachably connected to the connection block 50.
The slide portion 63 includes an inclined portion 65 at the end thereof to simultaneously cover the first and second receiving grooves 41 a and 43 a even when the first and second receiving grooves 41 a and 43 a are partially open.
The inclined portion 65 has a width smaller than that of the slide portion 63 to be easily detachable.
Moreover, the inclined portion 65 has an upwardly bent portion 67 at the end thereof and is connected to a base end of the first receiving groove 41 a in a reclining manner so as to facilitate the removal of the cover member 60 having the inclined portion 65 when the first wing portion 41 having the first receiving groove 41 a is inwardly folded.
Here, the first and second receiving grooves 41 a and 43 a may have a different configuration depending on the use of the intraocular lens 10 and the specifications such as the shape and size.
An example of the intraocular lens injector having the above-described configuration will be described as follow.
FIGS. 1 and 2 are perspective views showing the intraocular lens injector in accordance with the present invention in which the cartridge 40 and the cover member 60 are connected to each other.
First, in order to insert the intraocular lens 10 into the eye of a cataract patient, the intraocular lens 10 placed on the first and the second receiving grooves 41 a and 43 a of the cartridge 40 is moved into the guide passage 45 a of the truncated conical guide portion 45 by pushing the plunger 30.
Subsequently, the intraocular lens 10 moved into the guide passage 45 a is pressed close to the eye of the cataract patient using the plunger 30 and an elastic bush connected to the front end of the plunger 30 and then inserted into the eye of the cataract patient
After the intraocular lens 10 is inserted into the eye, the intraocular lens injector is discarded.
As such, the present invention provides a preset type intraocular lens injector, in which the intraocular lens 10 is placed on the first and the second receiving grooves 41 a and 43 a of the cartridge 40 and enclosed within the first and second receiving grooves 41 a and 43 a by the cover member 60. Therefore, the intraocular lens injector can be used as it is immediately during the surgery.
As described above, according to the present invention, the intraocular lens injector can be distributed in a state where the cartridge and the cover member are sterilized and vacuum packed with foil. Moreover, since the first and second wing portions of the cartridge can be maintained in a folded state by the engagement member, it is not necessary to cover the intraocular lens with a separate cartridge during the surgery, thus facilitating the handling during surgery or distribution.
Moreover, the intraocular lens placed in the cartridge can be inserted into eye by simply pushing the plunger, which facilitates the use of the intraocular lens injector of the present invention.
Accordingly, the intraocular lens injector can be mass-produced and commercialized.
It will be apparent to those skilled in the art that various modifications can be made to the above-described exemplary embodiments of the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention covers all such modifications provided they come within the scope of the appended claims and their equivalents.

Claims

1. An intraocular lens injector for inserting an intraocular lens into an eye, the intraocular lens injector comprising:

a cylindrical cylinder, into which a plunger for passing the intraocular lens to be guided into the eye is inserted;

a connection block having a C-shaped longitudinal cross-section and integrally formed at the front end of the cylinder;

a cartridge, which is connected to the connection block and includes first and second wing portions, which are folded with respect to each other, first and second receiving grooves formed at the connection portion of the first and second wing portions and having a semicircular longitudinal cross-section, and a truncated conical guide portion, which extends from the second receiving groove in the lateral direction and includes a guide passage having a circular cross-section corresponding to the shape of the assembled first and second receiving grooves; and

an engagement member having a circular cross-section corresponding to the shape of the assembled first and second receiving grooves and maintaining the intraocular lens in a folded state.

2. The intraocular lens injector of claim 1, wherein the engagement member comprises an engagement projection projecting from the first wing portion and an engagement groove fixedly engaged with the engagement projection.

3. The intraocular lens injector of claim 1, wherein the first and second receiving grooves of the cartridge include first and second opening portions formed inclined at the rear thereof to guide the insertion of the plunger.

4. The intraocular lens injector of claim 1, wherein the front end of the guide passage of the truncated conical guide portion has a diameter of 1.8 mm.

5. The intraocular lens injector of claim 2, wherein the first and second receiving grooves of the cartridge include first and second opening portions formed inclined at the rear thereof to guide the insertion of the plunger.